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Q.

A 3cm cube of iron has one face at 100oC and the other in a block of ice at 0oC. If k of iron=0.2 CGS units and L for ice is 80cal/gm, then the amount of ice that melts in 10 minutes is (assume steady state heat transfer)

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a

450 gm

b

500 gm

c

900 gm

d

350 gm

answer is A.

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Detailed Solution

mLt=kAθ1-θ2l⇒80m10(60)=0.2 x 3 x 3 x 1003
m = 450 gm

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